correlation-Name

A correlation-Name is given to a table expression in a
FROM clause as a new name or alias for that table. You do not qualify a correlation-Name with
a schema-Name.

You cannot use correlation-Names for updatable
columns; using correlation-Names in this way will cause an SQL exception.
For example:

SELECT c11 AS col1, c12 AS col2, c13 FROM t1 FOR UPDATE of c11,c13

In this example, the correlation-Name col1 FOR c11 is
not permitted because c11 is listed in the FOR UPDATE list
of columns. You can use the correlation-Name FOR c12 because
it is not in the FOR UPDATE list.